Portable riveter



July 18, 1950 P. B. TISIE PORTABLE RIVETER Filed March 27, 1944(Ittornegs Patented July 18, 1950 UNITED STATES PATENT OFFICE PORTABLERIVETER Patrick B. Tisie, Detroit, Mich. l Application March 27, 1944,Serial No. 528,229

3 Claims. l

The present invention relates to portable riveting machines.

The primary object of the invention is to provide a portable riveterhaving means for clamping the work prior to the riveting operation sothat the pieces of work will be united in face-toface contact and willbe held in this position during the upsetting of the rivet.

Another object of the invention is to provide a portable riveter havinga work-engaging clamp which is projected simultaneously with the plungerso as to engage the work rst before the plunger upsets the rivet and toprovide resilient spring means to permit the movement of the plungerrelative to the clamping sleeve after the same has engaged the work inthe vicinity of the rivet being set.

Another object of the invention is to provide a riveting machine of theabove-mentioned type having means for permitting adjustment of thestrokes to facilitate the use of the riveter with rivets of variouslengt-hs.

Another object of the invention is to provide a resilient spring meansfor retracting a rivet plunger and the clamping sleeve after the rivethas been set in the work.

Other objects and advantages will become apparent during the course ofthe following description of the accompanying drawing, wherein:

Figure 1 is a side elevational view of a riveting ,A

machine showing portions thereof broken away to illustrate the variousstructural details thereof and to show the manner in which the work isheld in the riveter between the jaws thereof prior to therivet-upsetting operation;

Figure 2 is a longitudinal cross sectional view taken on line 2-2 inFigure 1 looking in the direction of the arrows showing the rivetplunger and clamping sleeve, retractingmeans and showing the manner inwhich the stroke of the rivet plunger may be adjusted to accommodaterivets of various lengths;

Figure 3 is a transverse cross sectional view taken on line 3-3 inFigure l looking in the direction of the arrows further illustrating themanner in which the stroke of the rivet plunger may be adjusted foraccommodating rivets oi. various lengths; and

Figure 4 is a fragmentary side elevational view similar to Figure 1showing the clamping sleeve in its opposite position and the rivetplunger in position to upset the end of the rivet.

In the drawing, wherein for the purpose of i1- lustrating the inventionlike reference characters will be employed to designate like partsthroughout, the reference character 5 will generally be employed todesignate a casing or housing of a portable riveter including a handleportion 6, and a hollow casing section 'I having spaced walls 8connected to the top and bottom by parallel walls I 3. The side walls 3are extended as at l2 to provide spaced ears I3 between which isreceived a yoke member I 4 having jaw portions I5 and I Ii. Bolts IIextend through suitable apertures in the ears I3 and the yoke frame Illand nuts. I8 are threaded on the bolts to securely hold the yoke frameI4 in place relative to the casing I and handle portion 6. The yokeframe I4 has an opening I9 formed in the jaw portion I5 for receiving aremovable anvil 2U recessed as at2I to receive the head of a rivet Rwhich, as shown in Figure 3, has been passed through openings in theoverlapped work pieces W. The other jaw portion I3 of the yoke frame I 4is provided with a bore 22 in axial alignment with the anvil 20 and saidbore is fitted with a work-clamping sleeve 23 having its work-engagingend 24 projecting slightly beyond the edge of the jaw I6 in thedirection of the work W.

Slidably mounted within the work-clamping `sleeve 23 is a rivet plunger25 and said sleeve 23 is provided with longitudinal slots 26 arranged indiametrically opposed Vrelation for receiving a transverse pin 2l ttedin the end of the rivet plunger 25. The rivet plunger 25 may sliderelative to the sleeve 23 between the limits of the slot length 26 asindicated in Figure 1. The inner ends ofthe sleeve 23 and rivei'lplunger 25 project `into the housing 5 between the side walls 8 thereofand the extreme inner end of the rivet plunger 25 is provided with anaxially threaded bore 29 for receiving an adjusting screw 3! having anenlarged head 3|. A slotted washer 32 may be interposed between theextreme inner end of the rivet plunger 25 and the head3l of theadjusting screw so as to project the rivet plunger beyond apredetermined distance and permit the riveting machine to be used withrivets of various lengths. By substituting slotted washers 32 ofdiierent thicknesses, between the inner end of the rivet plunger 25 andthe head 3l, said rivet plunger may be made to project correspondingdistances and accommodate rivets of different lengths' anddifferentsizes.

Encircling the inner end of the rivet plunger 25l is a coil spring 34having one end in abutting relationship with the inner end of the workclamping sleeve 23 and the other end in abutting relationship andengagement with the slotted washer 32.

Pivotally mounted within the housing 5 is an operating lever 31 carriedon a pivot pin 38 and said operating lever 3l is bifurcated at one endfor receiving a roller or the like as at 39 pivotally mounted on a stubpin 40. Formed integral with the operating lever 31 is a cam projection4l which is presented to the adjusting screw 3l so as to project therivet plunger and work clamp ing sleeve 23 when air pressurel isadmitted to the riveter and the pivoted lever 31 swung on its pivot 38by means of a cam operator 43 having its cam face Ml in contactualengagement with the roller 33. In squeeze type riveters in which therivet is compressed, the cam bar B3 is usually connected to the plungerof a fluid compression system and said plunger is mounted in a cylindercommunicating with a source ofpressure so that admission of pressure tothe cylinder will move the piston toward one end and cause the cam arm43 to project into the housing 5 and through the handle portion 6 so asto depress the pivoted lever 31 by the contactual engagement of thecamsurface 44 with the roller 39.

The adjusting screw head 3l is provided with a series ofcircumferentially spaced radially eX- tending slots d5 for receiving atool or the like to facilitate adjustment of the head and the backingoff of the screw for the insertion of a slotted washer 32 of increasedor decreased thickness.

The rivet plunger 25 and clamping sleeve 23 are retracted by means ofcoil springs 50 disposed on each side thereof and one end of each coilspring is attached to a pair of oppositely arranged screw studs 5'! inthe inner walls 8 of I'.

the housing 5 while the opposite ends of the screws are hooked overthreaded studs 52 as at 53 extending in diametrically opposed relationfrom one end ofthe sleeve 23.

In operation, the work W is placed on the anvil in'overlapping relation,with the apertures therein in registry and the rivet R received thereinwith the head of the rivet arranged in the annular recess 2l. Thepressure control valve of the riveter (not shown) is then operated to r'project the cam arm 43 in a straightline path so thatv the cam surface44 will engage the roller 39 and rock the cam lever 3l on its pivot 38.Upon rocking movement of the cam lever 3l the cam projection 4| is movedinto engagement with the head 3| of the screw 30 so as to project theclamping lever 23 and rivet plunger 25 simultaneously until the end 24of the sleeve engages the work W. When the end 24 of the sleeve engagesthe work, the overlapping ends thereof will be clamped together so thatthe meeting faces thereof will ybe in mutual engagement so thatcontinued operation of the cam lever 3l -will cause the plunger 25 tomove relatively to the sleeve 23 and compress the spring 3l] so as toclamp the work under spring tension. After the clamping sleeve 23 hasbeen moved into clamping engagement with the work W as shown in Figureli. the end of the rivet plunger moves into engagement with the rivet Rand the socket or recess 5E in the end thereof engages the end of therivet and causes the same to be upset. Uponv retraction of the cam arm43 the springs move the sleeve 23 and plunger 25 to their initialstarting position. When it is desired to shorten or lengthen the strokeof the rivet plunger to accommodate rivets of various sizes, the boltsI1 and nuts I8 connecting the yoke I4 with the housing 5 may be removedso that the head of the bolt 3l may be untightened and a slotted washer32 of different thickness inserted in lieu of the one previously used.

It is to be noted that the transverse pin 2l operates in the bore 22 ofthe jaw I6 and during the major portion of the time the slots and pin 25and 21 are confined within said bore to be removed from the path offoreign matter and obstructions.

It is to be understood that the form of the invention herewith shown anddescribed is to be taken as a preferred embodiment thereof and thatvarious changes in the shape, size and arrangement of parts may be madewithout departing from the spirit of the invention or the scope of thesubjoined claims.

What I claim is:

1. A portable riveting machine, comprising a casing, a removable yokeframe connected to the casing having spaced jaws, a rivet anvil mountedin one of thejaws, a Work clamping sleeve slidably mounted in a bore inthe other jaw in opposed relation to the rivet anvil, a rivet plungerslidably mounted in the sleeve, a pin and slot connection between theplunger and sleeve to permit limited longitudinal movement therebetween,a coil spring encircling the inner end of the plunger having one endengaging the inner end of the sleeve, a retaining screw threaded in theinner end of the plunger having an enlarged head for receiving thethrust of the other end of the coil spring, a removable slotted lwasherinterposedy between the head of said screw and the end of the plunger toincrease or decrease the distance between the rivet plunger and rivetanvil and for engaging the other end of the screw, means within saidcasing for projecting the plunger, and resilient means connecting thesleeve and casing for retracting the. sleeve and plunger.

2. A portable riveter comprising a casing, a yoke framev secured to saidcasing and having spaced jaws, a rivet anvil mounted on one of saidjaws, a rivet plunger member slidably mounted in the other jaw in axialalignment with the anvil, mechanism including a driving member withinsaid casing engageable with said plunger for urging said plunger intoengagement with a rivet and the work respectively resting against saidanvil, an axially adjustable abutment element disposed between saidmembers and, having an extension connected to one of said members inaxially-spaced relationship thereto, and a spacing element inserted inand filling the space between said abutment element and the member to-which it is connected and having an aperture therein relceivingvsaidextension whereby to adapt said riveter to varying lengths of rivets byinterchanging spacing elements of different thikness in said space. v

3. A portable riveter comprising a casing, a yoke frame secured to saidcasing and having spaced jaws, a rivet anvil mounted on one of saidjaws, a rivet plunger member slidably mounted in the other jaw in axialalignment with the anvil, mechanism including a driving member Withinsaid casing engageable with said plunger for urging said plunger intoengagement with `a rivet and the work respectively resting against saidanvil, an axially adjustable screwthreaded abutment element disposedbetween said members and having a shank threaded into one of saidmembers in axially-spaced relationship thereto, and a spacing elementinserted in and lling the space between said abutment element and themember to which it is connected REFERENCES CITED The followingreferences are of record in the file of `this patent:

NITED STATES PATENTS Number Name Date 582,839 Winans May 18, 1897840,524 Sturdevant Jan. 8, 190'? Number Number Name Date Chaplin June22, 1915 Osborne Mar. 6, 1928 Harcourt June 1, 1937 Fischer Apr. 20,1943 Wales Apr. 27, 1943 Peterson et a1 Jan. 11, 1944 Wales Nov. 28,1944 FOREIGN PATENTS Country Date Great Britain Aug. 22, 1918 GreatBritain Jan. 3, 1939 Germany Apr. 24, 1939

